NCERT Based Test: Solenoid & Toroid - NEET MCQ

# NCERT Based Test: Solenoid & Toroid - NEET MCQ

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## 5 Questions MCQ Test NCERTs at Fingertips: Textbooks, Tests & Solutions - NCERT Based Test: Solenoid & Toroid

NCERT Based Test: Solenoid & Toroid for NEET 2024 is part of NCERTs at Fingertips: Textbooks, Tests & Solutions preparation. The NCERT Based Test: Solenoid & Toroid questions and answers have been prepared according to the NEET exam syllabus.The NCERT Based Test: Solenoid & Toroid MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NCERT Based Test: Solenoid & Toroid below.
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NCERT Based Test: Solenoid & Toroid - Question 1

### A solenoid of length 0.6 m has a radius of 2 cm and is made up of 600 turns. If it carries a current of 4A, then the magnitude of the magnetic field inside the solenoid is

Detailed Solution for NCERT Based Test: Solenoid & Toroid - Question 1

Here, n = 600/0.6 = 1000 turns/m, I = 4A
l = 0.6m, r = 0.02 m ∵ 1/r = 30 i.e., l >>r
Hence, we can use long solenoid formuls, then
∴ B = μ0nI = 4π x 10-7 x 103 x 4 = 50.24 x 10-4
= 5.024 x 10-3 T

NCERT Based Test: Solenoid & Toroid - Question 2

### A solenoid of length 50 cm, having 100 turns carries a current of 2.5 A. The magnetic field at one end of the solenoid is

Detailed Solution for NCERT Based Test: Solenoid & Toroid - Question 2

Here, I = 2.5 A , I = 50 cm = 0.50 m and n = 100/0.50 = 200 m-1
∴

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NCERT Based Test: Solenoid & Toroid - Question 3

### A 90 cm long solenoid has six layers of windings of 450 turns each. If the diameter of solenoid is 2.2 cm and current carried is 6A, then the magnitude of magnetic field inside the solenoid, near its centre is

Detailed Solution for NCERT Based Test: Solenoid & Toroid - Question 3

For six layers of windings the total number of turns = 6 x 450 = 2700
Now number of turns per unit length

Then the field in side the solenoid near the centre
B = μ0nI = 4π x 10-7 x 3000 x 6  = 72π x 10-4 T = 72πG

NCERT Based Test: Solenoid & Toroid - Question 4

Which of the following statement is incorrect?

Detailed Solution for NCERT Based Test: Solenoid & Toroid - Question 4

Option C is incorrect as magnetic field inside the core of the toroid varies greatly.

NCERT Based Test: Solenoid & Toroid - Question 5

The inner and outer radius of a toroid core are 28 cm and 29 cm respectively and around the core 3700 turns of a wire are wounded. If the current in the wire is 10A, then the magnetic field inside the core of the toroid is

Detailed Solution for NCERT Based Test: Solenoid & Toroid - Question 5

The number of turns per unit length for the given toroid n = N/2πrav
rav = (28 + 29)/2 = 28.5 cm 28.5 x 10-2 m

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